Scorposaurus

Though the following article does detail an official piece of Land Before Time media approved of by Universal, it should in no way be seen as a canon part of the Land Before Time universe established by the movies and TV series episodes.

"Scorposaurus" (misleadingly "scorpion reptile") is a fictional genus of colossal scorpion, far bigger than any known scorpion in the fossil record, depicted in The Land Before Time for the Gameboy Advance.

In The Land Before Time

Scorposaurus in the game

It is the first boss in the game, appearing in the first area, Dusty Desert. It will attempt to sting the player with its massive and long tail, but the player can damage it by rolling into its head with a spinning attack. It will be defeated after it has been hit seven times.